- ✓chloral
- Bphenylacetaldehyde
- Chexanal
- Dnitromethane
$(a)$ $\underset{(no\,\,\alpha -H)}{\mathop{\begin{matrix}
\,\,\,\,\,\,\,\,\,\,\,O \\
\,\,\,\,\,\,\,\,\,\,\,|| \\
C{{l}_{3}}\overset{\alpha }{\mathop{C}}\,CH \\
\end{matrix}}}\,$ $(b)$ $\underset{(\alpha -H)}{\mathop{{{C}_{6}}{{H}_{5}}\overset{\alpha }{\mathop{C}}\,{{H}_{2}}CHO}}\,$
$(c)$ $\underset{(\alpha -H)}{\mathop{{{C}_{4}}{{H}_{9}}\overset{\alpha }{\mathop{C}}\,{{H}_{2}}CHO}}\,$ $(d)$ $CH_3NO_2$
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Product $(A)$ is
$\begin{array}{*{20}{c}}
{\,\,\,\,\,\,\,O} \\
{\,\,\,\,\,\,\,\,||} \\
{C{H_3} - C - H}
\end{array}$ $\mathop {\xrightarrow{{HCN}}}\limits_{\mathop O\limits^\Theta H} (A)\mathop {\xrightarrow{{{H_2}O/{H^ \oplus }}}}\limits_\Delta $ Product
Product will be :